Strengthening and baking method for fan casting sand mold

By using ignition self-ignition and staged baking methods, the problem of insufficient baking of traditional fan casting sand molds was solved, achieving efficient and safe coating drying and strengthening, and improving the quality of castings and production efficiency.

CN122007343APending Publication Date: 2026-05-12ANHUI YONGCHENG MACHINERY CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202511580874.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-31
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

The traditional baking process for sand molds in wind turbine casting has problems such as insufficient baking leading to sand mold cracking, insufficient surface hardness, high energy consumption, and long production cycle. It is also difficult to effectively remove coating solvents and moisture, which affects the quality and safety of castings.

Method used

A method combining ignition and self-ignition with staged baking is adopted. The coating is initially dried by self-ignition of industrial alcohol, followed by staged baking at low and high temperatures to form a dense coating and gradient transition layer, thus optimizing the penetration and curing process of the coating.

Benefits of technology

It enables the safe and rapid removal of solvents and moisture from sand molds, improves the wear resistance of coatings and the precision of castings, reduces energy consumption and production cycle, and ensures the quality and safety of castings.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a fan casting sand mold strengthening and baking method, and relates to the technical field of fan casting, the fan casting sand mold strengthening and baking method comprises the following steps: S1, sand mold preparation: mixing sand, resin and a curing agent according to a mass ratio of 1: 0.01: 0.005, and carrying out natural reaction molding to obtain a sand mold matrix; s2, coating preparation: mixing the high-temperature-resistant fireproof coating with industrial alcohol to prepare slurry suitable for flow coating; s3, surface flow coating is conducted, specifically, the surface of the sand mold base body is coated with the slurry in a flow mode, and a uniform coating is formed; and S4, ignition and spontaneous combustion: igniting the slurry on the surface of the sand mold after flow coating. According to the method, through a synergistic dehydration mechanism combining ignition spontaneous combustion and staged baking, most of surface and shallow solvents are rapidly removed through alcohol spontaneous combustion, deep bound water is thoroughly and stably removed through a mild baking strategy of low temperature and high temperature, it is ensured that the sand mold is in an absolute dry state before pouring, and the quality of the sand mold is guaranteed. Therefore, the explosion risk caused by instant expansion of water vapor is eradicated.
Need to check novelty before this filing date? Find Prior Art